<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            width: 100px;
            height: 100px;
            /* 不存在的样式 */
            /* 不会影响后续渲染 */
            /* home:50px; */
            background-color: pink;
            
            border-radius: 50px;
            /* 兼容IE */
            -ms-border-radius: 50px;
            /* 兼容firefox */
            -moz-border-radius: 50px;
            /* 兼容opera */
            -o-border-radius: 50px;
            /* 兼容chrome和safari */
            -webkit-border-radius: 50px;
            
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>